Simrad ST90 - Improving the Recognition of Fish and Schools Using Receiver Filters; About the Receiver Filter Sequence in the ST90

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Improvingtherecognitionofshandschools
usingreceiverlters
Topics
AboutthereceiverltersequenceintheST90,page78
ReducingnoiseandreverberationwiththeAGC(AutomaticGainControl)function,page79
ReducingpropellernoiseandinterferencewiththeNoiseFilter,page81
ReducingbottomandsurfacereverberationwiththeRCG(ReverberationControlledGain)
function,page82
ReducingnoiseandfalseechoeswiththePing-PingFilter,page84
Adjustingtheintensityoftheechopresentations,page86
AboutthereceiverltersequenceintheST90
TheltersintheST90areimplementedin“series”.Anychangestoaltersettingmay
thereforehaveaneffectonsubsequentlters.
ABottomFilter
BNoiseFilter(1)
CGain&TVG(TimeVariableGain)
DNoiseFilter(2)
EAGC(AutomaticGainControl)
FRCG(ReverberationControlledGain)
GDisplayGain
HPing-PingFilter
SimradST90OperatorManual